Senior Flutter Developer

JobCubby; Kraków; Hybrid; PLN 210,000 - 270,000; Full time

Job summary

Mamo is seeking a Senior Flutter Developer to own the end-to-end development of its mobile apps in the fintech payments space. You will design modular components, optimize performance, and shape the mobile architecture while collaborating with product, design and engineering teams.

You should have 6+ years in mobile development with Flutter and Dart, a deep Flutter ecosystem understanding, and experience with CI/CD, testing, and secure authentication.

Qualifications

• 6+ years of mobile development experience including Flutter and Dart.
• Proven track record in developing and scaling mobile apps.
• Strong understanding of Flutter ecosystem and state management.

Responsibilities

• Own the end-to-end development and release for iOS and Android apps.
• Design and implement robust modular components for the mobile app.
• Optimize app performance, scalability and usability for great UX.
• Architect a scalable, secure and efficient codebase.
• Establish automated testing infrastructure with coverage.
• Collaborate with Product, Design and other engineers to create value.

Skills

Flutter & Dart

Mobile architecture

End-to-end delivery

CI/CD pipelines

App performance

Testing frameworks

Security authentication

Tools

Appium

Patrol

Maestro

Job description

Mamo is looking for a Senior Flutter Developer who is enthusiastic about building best-in-class FinTech apps. You will be part of a tightly-knit team of product engineers developing innovative solutions to the most challenging problems in the payments industry. You will have full ownership of the mobile architecture and help shape our technical strategy.

Why you’ll love working here

• Startup environment that’s big on individual responsibility and leans on process and automation.
• We’re big on culture. Work with stunning, supportive product, design and engineering teams on problems that matter.
• You will be learning and growing all of the time. From business, product, design to engineering you will be learning from a world-class team that is caring, kind, and empathetic.
• Mamo has the potential for a wide-reaching impact. Mamo is taking on the challenge of bringing about a new era of financial inclusion that begins close to home by providing access and experiences that make sense. That means you will never be bored.

What you will do

• Own the end-to-end development and release for our iOS and Android mobile apps.
• Design and implement robust modular components for our mobile app.
• Optimize app performance, scalability, and usability for exceptional user experiences.
• Architect a scalable, secure and efficient codebase.
• Troubleshoot issues, and implement effective solutions to ensure reliability.
• Establish automated testing infrastructure with comprehensive coverage.
• Collaborate closely with Product, Design, and other engineers to create value for users.
• Identify ways to improve our logging, monitoring, and APM to improve overall observability and performance.
• Define and implement mobile engineering best practices.
• Stay current with mobile and flutter technologies and adopting relevant advancements.
• Implement secure authentication mechanisms (e.g., OAuth, JWT, Firebase).
• Ensure a smooth user experience through efficient data handling and error management.
• Optimize API requests for minimal latency and bandwidth usage on mobile devices.

What we’re looking for

• 6+ years of mobile development experience including 3 years with Flutter and Dart.
• Proven track record in developing and scaling mobile applications.
• A deep technical understanding of the Flutter ecosystem and state management techniques.
• Proficiency in reactive programming, data binding and navigation frameworks.
• Expertise in implementing testing frameworks including E2E testing tools like Appium, Patrol or Maestro.
• Ability to balance rapid feature delivery with high-quality releases.
• Skilled in custom widgets development and push notifications setup.
• Experience with setting up CI/CD pipelines and app release processes.
• Experience building and maintaining packages and federated plugins.
• Ability to optimize app size while managing increasing complexity.
• Familiar with various monitoring tools.
• The capability of leveraging AI tools to enhance productivity and output quality.
• Ability to work in fast-paced environments, autonomously, with little supervision.
• A builder mindset: you don't just maintain processes — you improve them.